I am really interested in getting into local 3-Gun matches and am having problems trying to narrow down AR' to use for this only. I want it to have a 18" stainless barrel with a muzzle break instead of a flash suppressor, and a round handguard. I have been looking at JP Rifles, Larue, etc... and I would like to get some input from guys/gals who shoot 3-Gun and see what they like and why?